code: def testZero(self):
      expected = [1.0] * 3
      # Arbitrary sizes
      actual = SpectralWhitening()([0] * 100, [0] * 3, [0] * 3)
      self.assertEqualVector(actual, expected)
  
file_path: essentia/test/src/unittests/spectral/test_spectralwhitening.py
imports: from essentia_test import *
label_desc: Use image node_id 3 for calling the TestSpectralWhitening obj's underlying member method code with example usage: obj.testZero() without return types